Energy from the Ground - Self powered generator by Barbosa and Leal

[Pirate88179]

Does anybody have any suggestions on a signal generator that can do what this one does
[or better]
http://www.ebay.com/itm/Rigol-DG4102-Signal-Arbitrary-Waveform-Generator-AWG-100MHz-2Channel-LCD-Display-/201081553596
the above is a bit over present budget.
used or otherwise?
all suggestions welcome [it would be going to  the UK]

thanks

Chet K

Chet:

I have been looking at this one for a while:  ($125.00)

http://www.ebay.com/itm/20Mhz-Dual-ch-DDS-Function-Arbitrary-Waveform-Signal-Generator-sweep-Software-/121478479995

I might have to get the 12 Mhz one for $60.00 as money is still tight over here.

TK can check the specs and tell you if it is any good.  Obviously Chinese but today, what isn't?

Bill

[Pirate88179]

Chet:

Here is a 24 Mhz for $138.00:

http://www.ebay.com/itm/24Mhz-Dual-ch-DDS-Function-Arbitrary-Waveform-Signal-Generator-sweep-Software-/121478483178?tfrom=121478479995&tpos=top&ttype=coupon&talgo=undefined

Bill

Here are the specs for this one:

◆Sampling rate up to 250 MSa/s.
◆Built-in arbitrary waveform with 250 MSa/s sampling rate.
◆4 downloadable 2048 dots arbitrary waveform memories
◆With 12 bit wide waveform generator, the output waveform can be more delicate with low
distortion.
◆Fully numerical control. It can display and numerical control amplitude, offset, frequency, duty
cycle of current signal output and phase difference of two channels.
◆Each function can be adjusted by host computer.
◆Preinstalled 14 common waveforms.
◆High frequency accuracy: magnitude 10－6
◆High resolution: Full range frequency resolution can be 10 mHz.
◆Both main and subsidiary wave duty cycle are adjustable separately (0.1%~99.9%）.
◆All range continuously adjustable, digital directly setting.
◆High waveform accuracy: The output waveform synthesized by function calculation is of high
accuracy and low distortion.
◆Arbitrary waveform: User can load arbitrary waveform according to the need.
◆Sweep Function ： Linear sweep and Logarithmic sweep. Starting and stop points can be set
optionally.
◆Save function: 20 sets of parameters defined by the users can be saved and loaded anytime.
◆Operation mode: Button and knob controlled with LCD1602 display, digital set directly or knob
adjusted continuously.
◆Highly reliable ： Large scale integrated circuit, Surface mounting technology, reliable and
durable.
◆Frequency measurement ： Frequency of internal / external signal can be measured through
built-in 100MHz frequency meter.
◆Follow function: Built-in parameter follow function covering frequency, amplitude, offset, duty
cycle, waveform etc. for user's convenience.
◆Trigger output function: User can choose manual trigger, external trigger or CH2 trigger to
control the main output to output waveforms of specified periodicity. This periodicity can also be defined by the user

[Farmhand]

While Dragon has surprised me by posting even that much, it should be clear that the circuit diagram above is _not_ complete. There is no indication of the turn count on the "primary" of the toroid. Nothing about toroid material. Nothing is indicated about the _input_ to the inverter, the inverter type (make and model), or how the input and output power measurements were done.

One of the basic requirements of the scientific reporting of "experiments" or even patent applications is that the information should enable someone "skilled in the art" to reproduce the experiment or device and (potentially, no pun intended) to get the same results as claimed. There isn't enough information in Dragon's diagram to do that.

I'd like to know the make and model of the inverter. Is it possible that the measurements are of _reactive power_ circulating in the output loop?

Worse I think, you might find the 400 amps is just the measured current circulating in a shorted few turns, and I think the primary would be the 120 volt input winding of a step down transformer,  just like in the B&L setup. Anyone can do that.

..

[TinselKoala]

Worse I think, you might find the 400 amps is just the measured current circulating in a shorted few turns, and I think the primary would be the 120 volt input winding of a step down transformer,  just like in the B&L setup. Anyone can do that.

..

Sure they can. But on 8 watts of input power?

I just looked at my MicroQEG demonstration numbers, and I was able to measure a bit over 10 amps p-p circulating in the coil with about 4-6 watts input power. Good measurements too. Some of my wireless power systems have 40-60 amps in the transmitter loop but generally need 25 watts or so on the input.

[TinselKoala]

Chet:

I have been looking at this one for a while:  ($125.00)

http://www.ebay.com/itm/20Mhz-Dual-ch-DDS-Function-Arbitrary-Waveform-Signal-Generator-sweep-Software-/121478479995

I might have to get the 12 Mhz one for $60.00 as money is still tight over here.

TK can check the specs and tell you if it is any good.  Obviously Chinese but today, what isn't?

Bill

At those prices, if it breaks or is otherwise unsatisfactory, you can just toss it in the bin and get another one! Not even worth trying to repair it or even to send it back to the factory for service.

But they don't appear to have synch out, trigger/synch in, or a VCF in for remote frequency control by another FG.

But who needs those functions anyway. (Besides me, I mean.) 

ETA: Sorry, I see from the list of specs Bill posted that some of those functions are indeed available. Doesn't seem like there are nearly enough BNC connectors for all that though.

Heck, I'd like one to experiment with myself. I wonder how it would fare in, say, an Ainslie experiment where significant current must pass _through_ the FG while it is operating...